Rotary vaporizing carburetor



April 29, 1930; w. J. BAKER ROTARY YAfORIZING CARBURETOR Filed Dec. 8,l92 2 Sheets-Sheet 1 INVENTOR 772L564 M By 2721?. MMW

ATTORNEY April 29, 1930. w, BAKER 1,756,805

ROTARY VAPORIZING CARBURETOR Filed Dec. 8, 1928 2 Sheets-Sheet 2INVENTOR maawim A TTORNE Y i so Patented Apr. 29, 1930 UNITED STATESPATENT OFFICE W.ALTER J. BAKER, OF CHILLICOTHE, MISSOURI ROTARYVAPORIZING CARB'URETOR Application filed December a, 1928. Serial No.324,721.

My invention relates to rotary vaporizing carburetors, and the objectsof the invention arecentrifugal type having facility to more completelyvaporize liquid fuel and mix air therewith to form an explosive mixturefor intervaporizing chamber and thereby provide a vaporized gaseous drymixture to start the engine and obviate the use of the choke only forthe purpose, which practice allows the introduction of liquid fuel tothe intake manifold and consequent dilution of the crank case contents.v

Fourth. To provide manually operable means to change the relativerichness of the fuel mixture to meet variable operating conditions. I

Fifth. A further object of the invention is to provide a rotarycarburetor having the throttle valve located at the inlet instead of theoutlet end of the carburetor to obtain the advantage of the loweratmosphere pressure behind the throttle and Venturi-tube.

I attain these objects and other advantages that will hereinafter appearby means of the apparatus illustrated in the accompanying drawing inwhich r Figure 1 is aside elevation of a carburetor embodying myinvention and showing the same connected in operative position. Figure 2is a transverse section of the carburetor, on the line 22 in Figure 1.

Figure 3 is avertical section through the carburetor. v

Figure 4 is an end view of the casing member and,

Figure 5 is a plan view of the head portion of thecarburetor.

First. To provide a carburetor of the rotary Similar numerals ofreference refer to corresponding parts throughout the several views.

Referring to the drawings, the numeral 1 designates a carburetorconstructed in accordance with my invention. 3 is fairly representativeof the conventional float-feed container for liquid fuel having a feedpipe 4 connected thereto. The carburetor comprises a cup-shapedseparating and vaporizing chamber 5 having circumferentially of its walla series of longitudinally extending slots 6 and which extend inwardlyto adjacent the bowl 7 of the vaporizer. The side walls of said slotsare formed upon different angles, as shown at 8 and 9 in Figure 2, andthe inner end walls of the slots are outwardly beveled,

as shown at 10 in Figure 3. The bowl portion of the vaporizer has anannular flange 11 on its outer circumference and an axial bore in whichapipe 12, having an annular flange 13 adapted to bear on the inner'sideof the bowlto hold the pipe in place with the cooperation of a nut 14which is screwed on the threaded portion of the pipe. An elbow 15 isscrewed on the outer end of the pipe and has a flange 16 adapted forconnection to the intakemani fold, not shown, in the well understoodmanner. Thepipe is extended into the vaporizer chamber to adjacent theinner ends of the slots 6. An annular casing member 17 is arranged tosurround the vaporizer chamber and has a diameter adapted to be spacedfrom the vaporizer a suitable distance to provide of the space anannular chamber 18. The inner end of the casing member bears on the.flange 11 and is held in place by a disk 19 which clamps the casingmember to the flange 11; Screws 20 are extended through holes .21 in thedisk and screwed into the peripheral edge ofthevaporizer, as shownin;Figure 3. A. Venturi-tube duct 22 is secured in an opening 23 in thelower portion of the casing member and is formed with a convergingthroat. A butterfly-valve 24 is pivotally mounted in the duct 22 and insuch a manner that the pivot 25 carrying the valve shall be stationedabove the middle of the valve to thereby invest the valve with an uppershort angularly disposed portion 26 and a long vertical lower portion.

' carry particles of the fuel passing from pipe 4.

27 so that when the valve is rotated to the open position air and fuelwill first enter at the bottom of the duct and followed by the admissionof additional air at the opening of the upper portion of the valve. Therod 25 is extended outwardly of the Venturi-duct a lit-tle distance anda link 28 is secured thereon and connected to a throttle rod, not shown.The feed pipe 4 is extended through the side of the duct 22 and a littledistance into the same and there terminating in aninwardly bent portion29. A mixture distributing pipe 30 is extended through the floor of theduct in diagonal direction to adjacent the end of the pipe 4 and isspacedtherefrom a suitable distance to permit the air drawn through theduct to the vaporizing chamber to contact and to pipe 30. The pipe 30 isdownwardly'inclined and extends to the lower side of the casing 17 whereit is bent upwardly and the bent portion extended through the casinginto the chamber 18 where it terminates in a nozzle 31 adapted to Ventfuel directly into the chamber 18 at a point in line with one of theslots 6. A branch pipe 32 is connected at its one end to pipe 30 and isextended around the inner side of the casing in chamber 18 to a point atthe upper side of the vaporizer where its terminal portion is bent atright angles and. the bent portion extended into one of the slots 6, thebent portion terminating in a nozzle 33 adapted to vent fuel into thevaporizer through said slot.

The carburetor constructed in accordance with my invention is connectedto the intake manifold of the motor. not shown, in the well understoodmanner. The fuel feed pipe is connected to the float-feed container andto the Yenturi-tube of the carburetor and the link 28 is connected tothe throttle rod, not shown. As the motor starts the down strokes of thepistons the air and fuel mixture is drawn through the Venturi-tube, ifthe throttle valve is partly opened. The fuel flows through the pipe 4from the float-feed container and is delivered at the end 29 ofthe pipeto pipe 30. The space between the ends of the pipes 4 and 30 is for thepurpose of allowing the air moving at high velocity induced by the motorsuction to mix with the fuel passing from pipe 4 to pipe 30, the mixturepassing into the chamber 18, in the direction of the arrows marked onFigure 2, and passing from the chamber 18 through the tangential slots 6into the separator and vaporizing chamber and assuming therein a rotarymotion, as indicated by the arrows on Figure 2. The mixture of air andfuel being drawn into the vaporizing chamber at an angle and at highvelocity a gyrating column of cyclonic speed is induced which is capableof disintegrating and vaporizing particles of the liquid fuel in themixture. The gasoline content of the mixture on entering the separatorand vaporizer is in a more or less finely divided state, as mist ordrops, and floating in the g rating column are vaporized, whereupon, t edry gaseous fuel converges to the axis of rotation and by virtue of itslow specific gravity is drawn into the pipe 12 and passes into theintake manifold connected therewith. The particles of the liquid fuelare not drawn into the pipe 12 because the high velocity at which thegyratin column rotates induces centrifugal force to old the particles atthe outer edge of the column where they are carried about a circularpath and are acted upon by the high velocity streams of air moving at anoblique angle to their travel and thereby efi'ecting disintegration andvaporizing the fuel to a gaseous state. The separator and vaporizerfunctions to hold the fuel particles apart from the dry gas and tovaporize the same by the influx of air at an oblique angle. Theauxiliary pipe 32 discharges fuel from the nozzle 33 at an oblique angleinto slot 6 at the upper side of the vaporizer, likewise nozzle 31 ventsfuel into the chamber 18. A great advantage of the carburetor is thatnothing but a dry combustible or explosive mixture can pass into theintake manifold and thereby preventing dilution of the crank case oiland obviatin the use of the choke for starting the motor.

aving described my invention what I claim is- 1. In a rotary vaporizer,the combination with the intake manifold of an internal combustionengine, of a central circular hollow body having circumferentially aseries of elongated inlet ports extending obliquely through its wall andprovided axially with an outlet pipe communicating with the hollow bodyand adapted to communicate with the intake manifold of the engine, anannular duct or chamber surrounding said hollow body and communicatingwith the inlet ports there-' in, a Venturi-tube communicating with saidannular duct or chamber and with atmosphere, a main fuel feed pipecommunicating with said Venturi-tube and with a source of liquid fuel,and auxiliary fuel feed pipe registering with the end .of said main fuelfeed pipe and provided within the annular duct or chamber with nozzleportions adapted to vent liquid fuel therein, and a rotatably mountedvalve in said Venturi-tube inwardly of said feed pipes to regulate theadmission of a mix-' ture of air and fuel to'said annular duct orchamber to be drawn therefrom by suction into the hollow body in obliquestreams of high velocity to produce in the hollow body a rotary gyratingcolumn of explosive mixture capable of vaporizing liquid particles offuel and collect the dry vapor at the axis of rotation of the rotatingcolumn of air and fuel.

2. The combination, in a rotary vaporizing carburetor, of a centralcup-shaped body having an outlet portion adapted to communicate with theengine intake manifold and provided circumferentially with an annularseries of elongated inlet ports extendin obliquely through its walls,the op osite wa ls of said ports being formed inwar 1y converging andthe end walls of the ports being outwardly beveled, a casing secured onsaid body and spaced apart therefrom to form of the space an annularchamber, said chamber being provided with an inlet portion extending atright angles to the casin to allow fuel mixture to flow into the chainer, and an auxiliary fuel feed mixture pipe extending into the chamberand having in the chamber a plurality of nozzles adapted to vent fuelmixture through the inlet orts in said body.

. EVALTER J. BAKER.

